1 /* Am29k-dependent portions of the RPC protocol
3 Contributed by Wind River Systems.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
25 #include "vx-share/regPacket.h"
32 #include "symfile.h" /* for struct complaint */
35 #include "gdb_string.h"
38 #include <sys/types.h>
40 #include <sys/socket.h>
42 #ifdef _AIX /* IBM claims "void *malloc()" not char * */
43 #define malloc bogon_malloc
47 #include <sys/time.h> /* UTek's <rpc/rpc.h> doesn't #incl this */
49 #include "vx-share/ptrace.h"
50 #include "vx-share/xdr_ptrace.h"
51 #include "vx-share/xdr_ld.h"
52 #include "vx-share/xdr_rdb.h"
53 #include "vx-share/dbgRpcLib.h"
55 /* get rid of value.h if possible */
59 /* Flag set if target has fpu */
61 extern int target_has_fp
;
63 /* Generic register read/write routines in remote-vx.c. */
65 extern void net_read_registers ();
66 extern void net_write_registers ();
68 /* Read a register or registers from the VxWorks target.
69 REGNO is the register to read, or -1 for all; currently,
70 it is ignored. FIXME look at regno to improve efficiency. */
73 vx_read_register (int regno
)
75 char am29k_greg_packet
[AM29K_GREG_PLEN
];
76 char am29k_fpreg_packet
[AM29K_FPREG_PLEN
];
78 /* Get general-purpose registers. When copying values into
79 registers [], don't assume that a location in registers []
80 is properly aligned for the target data type. */
82 net_read_registers (am29k_greg_packet
, AM29K_GREG_PLEN
, PTRACE_GETREGS
);
84 /* Now copy the register values into registers[].
85 Note that this code depends on the ordering of the REGNUMs
86 as defined in "tm-29k.h". */
88 bcopy (&am29k_greg_packet
[AM29K_R_GR96
],
89 ®isters
[REGISTER_BYTE (GR96_REGNUM
)], 160 * AM29K_GREG_SIZE
);
90 bcopy (&am29k_greg_packet
[AM29K_R_VAB
],
91 ®isters
[REGISTER_BYTE (VAB_REGNUM
)], 15 * AM29K_GREG_SIZE
);
92 registers
[REGISTER_BYTE (INTE_REGNUM
)] = am29k_greg_packet
[AM29K_R_INTE
];
93 bcopy (&am29k_greg_packet
[AM29K_R_RSP
],
94 ®isters
[REGISTER_BYTE (GR1_REGNUM
)], 5 * AM29K_GREG_SIZE
);
96 /* PAD For now, don't care about exop register */
98 memset (®isters
[REGISTER_BYTE (EXO_REGNUM
)], '\0', AM29K_GREG_SIZE
);
100 /* If the target has floating point registers, fetch them.
101 Otherwise, zero the floating point register values in
102 registers[] for good measure, even though we might not
107 net_read_registers (am29k_fpreg_packet
, AM29K_FPREG_PLEN
,
109 registers
[REGISTER_BYTE (FPE_REGNUM
)] = am29k_fpreg_packet
[AM29K_R_FPE
];
110 registers
[REGISTER_BYTE (FPS_REGNUM
)] = am29k_fpreg_packet
[AM29K_R_FPS
];
112 /* PAD For now, don't care about registers (?) AI0 to q */
114 memset (®isters
[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE
);
118 memset (®isters
[REGISTER_BYTE (FPE_REGNUM
)], '\0', AM29K_FPREG_SIZE
);
119 memset (®isters
[REGISTER_BYTE (FPS_REGNUM
)], '\0', AM29K_FPREG_SIZE
);
121 /* PAD For now, don't care about registers (?) AI0 to q */
123 memset (®isters
[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE
);
126 /* Mark the register cache valid. */
128 registers_fetched ();
131 /* Store a register or registers into the VxWorks target.
132 REGNO is the register to store, or -1 for all; currently,
133 it is ignored. FIXME look at regno to improve efficiency. */
136 vx_write_register (int regno
)
138 char am29k_greg_packet
[AM29K_GREG_PLEN
];
139 char am29k_fpreg_packet
[AM29K_FPREG_PLEN
];
141 /* Store general purpose registers. When copying values from
142 registers [], don't assume that a location in registers []
143 is properly aligned for the target data type. */
145 bcopy (®isters
[REGISTER_BYTE (GR96_REGNUM
)],
146 &am29k_greg_packet
[AM29K_R_GR96
], 160 * AM29K_GREG_SIZE
);
147 bcopy (®isters
[REGISTER_BYTE (VAB_REGNUM
)],
148 &am29k_greg_packet
[AM29K_R_VAB
], 15 * AM29K_GREG_SIZE
);
149 am29k_greg_packet
[AM29K_R_INTE
] = registers
[REGISTER_BYTE (INTE_REGNUM
)];
150 bcopy (®isters
[REGISTER_BYTE (GR1_REGNUM
)],
151 &am29k_greg_packet
[AM29K_R_RSP
], 5 * AM29K_GREG_SIZE
);
153 net_write_registers (am29k_greg_packet
, AM29K_GREG_PLEN
, PTRACE_SETREGS
);
155 /* Store floating point registers if the target has them. */
159 am29k_fpreg_packet
[AM29K_R_FPE
] = registers
[REGISTER_BYTE (FPE_REGNUM
)];
160 am29k_fpreg_packet
[AM29K_R_FPS
] = registers
[REGISTER_BYTE (FPS_REGNUM
)];
162 net_write_registers (am29k_fpreg_packet
, AM29K_FPREG_PLEN
,
167 /* VxWorks zeroes fp when the task is initialized; we use this
168 to terminate the frame chain. Chain means here the nominal address of
169 a frame, that is, the return address (lr0) address in the stack. To
170 obtain the frame pointer (lr1) contents, we must add 4 bytes.
171 Note : may be we should modify init_frame_info() to get the frame pointer
172 and store it into the frame_info struct rather than reading its
173 contents when FRAME_CHAIN_VALID is invoked. THISFRAME is unused. */
176 vx29k_frame_chain_valid (CORE_ADDR chain
, struct frame_info
*thisframe
)
180 read_memory ((CORE_ADDR
) (chain
+ 4), (char *) &fp_contents
, 4);
181 return (fp_contents
!= 0);
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